Microwave noise parameter measurements of a high temperature superconducting flux flow transistor

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6045557

O'Callaghan, J M; Martens, J S; Thompson, J H; Beyer, J B ^[1]

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1. Wisconsin Univ., Madison, WI (United States). Dept. of Electrical and Computer Engineering

This paper reports on the noise parameters of a HTS flux flow transistor made of TiBaCaCuO operating at 77 K and 3--5 GHz experimentally determined. It is assumed that the dominant noise mechanism of the device, which is based on an array of weak links with a magnetic control line is due to the statistical nature of flux nucleation and motion in the links. The noise parameters dictate the dependence of the noise figure on the source impedance and were calculated by measuring the noise figure with a number of different source impedances. Sensitivity analysis is used to estimate the accuracy of the measurements. The measurements indicate a minimum noise figure of less than 1 dB at 3 GHz.

• OSTI ID: 6045557
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HIGH-TC SUPERCONDUCTORS
TRANSISTORS
NOISE
CALCULATION METHODS
MAGNETIC FLUX
MAGNETOMETERS
MICROWAVE RADIATION
SENSITIVITY ANALYSIS
WEAK-COUPLING MODEL
ELECTROMAGNETIC RADIATION
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUCLEAR MODELS
RADIATIONS
SEMICONDUCTOR DEVICES
SUPERCONDUCTORS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)
661100 - Classical & Quantum Mechanics- (1992-)